Use chunk reader instead of readline() function from super.

Author: varuna-sd

stream/io/s3.py

@@ -169,9 +169,6 @@ def read(self, n: int = -1) -> bytes:
         return super().read(n=n)
 
     def readline(self, limit: int = -1) -> bytes:
-        if self._lines:
-            return super().readline(limit=limit)
-
         try:
             self.__load_current_chunk()
         except StopIteration: